21934094 has 32 divisors (see below), whose sum is σ = 42631680. Its totient is φ = 8219232.

The previous prime is 21934093. The next prime is 21934127. The reversal of 21934094 is 49043912.

It is a happy number.

It is a super-2 number, since 2×21934094² = 962208959201672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21934094.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21934093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (1332240).

Almost surely, 2^21934094 is an apocalyptic number.

21934094 is a deficient number, since it is larger than the sum of its proper divisors (20697586).

21934094 is a wasteful number, since it uses less digits than its factorization.

21934094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 21934094 is about 4683.3848870235. The cubic root of 21934094 is about 279.9238483385.

The spelling of 21934094 in words is "twenty-one million, nine hundred thirty-four thousand, ninety-four".